How can I create a 3D cubic-bezier curved triangle from 3D points in Three.js?

Question

Following this topic, I am trying to generate a 3D curved triangle as a NURBS surface, but I don\'t understand how to set up my 3D points to do that.

Here is the cur

Answer 1

In your code you use NURBSSurface function from NURBSSurface.js file, that function uses NURBSUtils.calcSurfacePoint function from NURBSUtils.js file. But the calcSurfacePoint calculate point for standard NUBRB surface where where parameter are from rectangle (u,v) wiki.

You will not generate "3D cubic bezier triangle" in this way - to do this you need write your own code which will use bezier-triangle formulas (where the input parameters are triangle points in Barycentric_coordinate_system).